title: Rational design and application of molecularly imprinted sol-gel polymer for the electrochemically selective and sensitive determination of Sudan I.
abstract: An electrochemical strategy on the basis of rationally designed molecularly imprinted sol-gel polymer embedded with gold nanoparticles (AuNPs) is developed for the specific and sensitive determination of Sudan I. The rationally designed sensing Sudan I imprinted sol-gel was prepared by mixing Sudan I with 3-aminopropyltriethoxysilane, tetraethoxysilane, chitosan, and AuNPs, followed by copolymerization and extraction of the template molecules. The hybrid forming membrane was characterized by SEM and FTIR-ATR, and used for the linear sweep voltammetric (LSV) determination of Sudan I in water/ethanol solutions. The LSV responses exhibited high sensitivity and selectivity, as discriminated from Sudan I analogues. Under optimal experimental conditions, LSV peak currents were linearly proportional to the concentrations of Sudan I in the range from 0.1 × 10(-7) to 1.0 × 10(-5)M, with a detection limit of 2.0 × 10(-9)M. The strategy is generally applicable in developing sensitive, selective, and moreover, reusable electrochemical sensors for quantitative determination of electroactive species.
authors.affiliation: Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, PR China.
authors.forename: Shizhen
authors.initials: S
authors.lastname: Chen
authors.forename: Dan
authors.initials: D
authors.lastname: Du
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.forename: Aiqing
authors.initials: A
authors.lastname: Zhang
authors.forename: Haiyang
authors.initials: H
authors.lastname: Tu
authors.forename: Aidong
authors.initials: A
authors.lastname: Zhang
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D008855:Microscopy, Electron, Scanning; D009284:Naphthols / Q000032:analysis*; D011108:Polymers / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties
chemical_list: D009284:Naphthols; D011108:Polymers; D012997:Solvents; C024336:1-phenylazo-2-naphthol